

5-bromo-4-chloro-3-indoxyl-β-D-glucopyranoside by Molecular Depot is a known as X-β-D-glucoside, a chromogenic substrate for β-D-glucosidase. Cleavage releases an indoxyl that oxidises and dimerises in air to an insoluble blue indigo dye, so the colour forms as a precipitate at the site of the enzyme. It is used as a chromogenic substrate in β-glucosidase detection on plates and in gels, in microbial identification media and in histochemical staining. Each unit contains 500 mg. MBP supplies Molecular Depot carbohydrate reagents to research labs in the United States, Canada and worldwide.